2012 SSANGYONG RODIUS Service Manual

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(4) Maintenance
If the charge warning lamp ( ) on the instrument cluster comes on while driving, there is a
malfunction in the charge system including the battery. Therefore, carrying out the system check
is needed.
Make sure that the battery cables are firmly connected.
If the terminals are corroded, clean them with a wire brush or sandpapers.
Always disconnect the battery cables with the ignition key removed. When disconnecting the
battery cables with the ignition key turned to ON or ACC position, several electric units can
be damaged due to sudden voltage change.
Check the battery for crack, damage or fluid leaks. Replace it if necessary.
Wipe out the battery fluid on the battery surface using a rubber glove and a clean cloth
wetted with soapy water. -
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09-10
Alternator
The alternator charges the battery and
supplies power to each electric unit by
converting the mechanical energy to the
electrical energy.
1. SYSTEM DESCRIPTION
1) Overview
The charge system is designed to supply electrical energy to the vehicle while driving, and supplies a
constant direct current voltage by converting mechanical rotational movement to electrical energy.
The voltage regulator on the back of the alternator controls the generated voltage in all rotating ranges
and adjusts the system voltage according to the electric load and ambient temperature change.
2) System Layout (Locations)
Battery
It converts the chemical energy to the
electrical energy and supplies power to
the corresponding electric units when
starting the engine.

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2. OPERATING PROCESS
1) Charging Flow

09-12
Alternator (115 A)
2) Charging
The alternator uses a new regulator which has three diodes. It consists of the delta stator, rectifier
bridge, slip ring and brush.
Charging time according to vehicle conditions and environment ▶
Specification: Charging a fully depleted high-
capacity battery takes twice or more as long
as charging a fully depleted battery for small
vehicles.
Temperature: The lower the temperature is,
the longer the time taken to charge the
battery. When connecting the battery charger
to the cold battery, the amount of current the
battery can accept initially is very small. As the
battery gets warmer, it can accept more
current.
Charging capacity: Charging a battery with a low-capacity charger takes longer time than
charging with a high-capacity charger.
Charging status: Charging a fully depleted battery takes twice or more as long as charging a half-
depleted battery. Since the electrolyte in a fully depleted battery consists of nearly pure water and
conductor, only a very small amount of current can be accepted by the battery initially. The
charging current increases as the amount of acids in the electrolyte is increased by the charging
current.
3) Output Characteristics
Alternator (140 A)

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3. CIRCUIT DIAGRAM

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1. SPECIFICATIONS
Description Specification
Glow plug Rated voltage 4.4 V
Max. temperature1100 °C
Operating temperature1080 °C ~ 1000 °C
Resistance23 °C: 0.39 ~ 0.52Ω
Glow plug control unit Operating voltage 6 ~ 16 V
Operating temperature-40°C ~ 110°C
Dark current Max. 1 mA

10-4
1. OVERVIEW
The pre-heating system for D20DTR engine has the glow plug to the cylinder head (combustion
chamber), and improves the cold start performance and reduces the emission level.
The pre-heating resistor (air heater) is used to heat the intake air.
This enables the diesel fuel to be ignited in low temperature condition.
The ECU receives the information such as, engine rpm, coolant temperature, engine torque, etc.,
through CAN communication during pre-heating process; and the pre-heating control unit
controls the pre-heating, heating during cranking and post-heating by the PWM control.
Glow plug
Engine ECU (D20DTR)Glow indicator
Glow plug control unit
(GCU)

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2. SYSTEM OPERATION
1) Input/Output Diagram of Glow Plug Control Unit
2) System Diagram